Chain-stitch shoe-sewing machine.



J1 J.H 'BYS.

GRAIN STITCH SHOE BIIWINGMAGHINE.

APPLIUATION FILED AUG. 13, 2904. 902,880. Patented Nov. 3, 1908.

I SHEETS-SHEET 1.

\K/ ITNEZSSEIS J. J. HEYS. CHAIN STITCH SHOE SEWING MAUHINE.

APPLIUATIOH FILED 11138.13, 1904. 902,880, Patented Nov. 3,1908. 7 SHEETS-SHEET BNTEIR:

\-m .f I mm m M I n 1 I, K N? M m a? M Y E M 7 in 2 5 Q a m R om m J. J. HEYS. CHAIN STITCH SHOE SEWING MACHINE.

APPLICATION FILED AUG.13,1904. 902,880. Patented Nov. 3, 1908.

I SHEETS-SHEET 3.

WTNESSES:

fifiixxck J. J. HBYS. CHAIN STITGE SHOE SEWING MACHINE.

APPLIOATIOH FILED AUG. 13, 1904 Nov 3 1 BHEETB-SHEET 4.

77 'NVEINTEIR:

J. J. HEYS. CHAIN STITCH SHOE SEWING MACHINE.

APPLIOATIOH FILED AUG.13. 1904. 902,880. Patented Nov. 3, 1908.

1 SHEETS-SHEET 6.

\XQTNEISSEIS: INVE. TEIR} YUM? @395?" J. J. HEYS. 01mm STITCH SHOE SEWING MACHINE.

APPLIUATIOU FILED AUG. 13, 1904.

Patented Nov. 3, 1908 '7 SHEBTSSHEBT 64 J. J. H UHAIN STITCH SHOE NG MACHINE.

WITNESSES:

C -43mm I UNITED STATES PATENT OFFICE.

JOHN J. HEY S, OF LYNN, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO BRESNAHAN SHOE MACHINERY GOMPANY, OF LYNN, MAS- SACHUSETTS, A CORPORATION OF MAINE.

CHAIN-STITCH MO E-SEWING MACHINE.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed August 1a, 1904. Serial No. 220,001.

To all whom it may concern:

; Be it known that I,Jorm J. Haas, of Lynn,

in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Chain-Stitch Shoe-Sewing Machines, of which the. following is a specification.

4 This invention relates to wax-thread chain stitch shoe-sewing machines of the ty e used ings which illustrate one form or embodijnent thereof, and said invention consists of the features, parts, and combinations as hereinafter defined by the claims. 7

On the drawings :-Figure 1 shows the left side elevation of a stitching machine embodying the several improvements of this inven- 'tion. Fi 2 shows the machinein front elef'yation. ig. 3. is a right side elevation.

ig. 4 is an enlarged view of the stitc mechanism. Fig. 5 is an enlar ed view- 0' the shoe-feedingmechanism. Fig. 6 is a section on the line 66 of Fig. 4. 7 is a sec tion on the line 77 of Fig. 5. Fig. 8 is a section on the line 8-8 of Fig. 5. Figs. 9,10 and 11 illustrate the looper and its actuating mechanism. Fig. 12 is a section on line 1212 of Fig. 11. Fig. 13 shows the work gages and their locking mechanism. Fig. Lil is-a section on the line 14-14 of Fig. 13. 15 is a plan view of the tension de-.

vice F gs. 16, 17 and '18 show the stitching mechanism in different ositions. 19 is a' gperspective view 0 the stitch-formin mechanism as it appears in the first stage 0 forming anew stitch. Figs. 20, 21 and 22 illustrate the successive stages in the formation of a stitch.

Referring to the drawings, the same refer- Ence characters indicate the same parts in all res. 'l he machine illustrated by said drawings is but one embodiment of the invention, and

. rial No. 172,352,

it will be understood that it may be varied in many ways without departing from the s irit and scope of the invention; and it will be further understood that the'terms and phraseology herein employed are for the purpose of description and not of limitation.

The machine as a whole \comprises the head A which is" ad'ustably sup ortcd on a suitable standard On the ead A are supported the various operative portions of the mechanism, said operative mechanisms all driven from the shaft 16, joumaled in suitable bearin in the head. The head is arranged at an inclination to the horizontal, as described in m previous application Sehas a rearwardly and upwardly pro'ecting arm A, to which are secured forward y rojecting brackets A in which the power-s aft 16 is ournaled. This construction and arin Sept. 8, 1903,-and it rangement of parts provides for the complete exposure ofvthe operative mechanism of the machine. wherebythey. are easily accessible for theypurposes of repair, cleaning, p and adjustment} T For the purpose of transmitting power so from shaft 16 to the various operative mechanisms, such as the needle+actuating mechanism, awl actuating mechanism, looper mechanism, etc., I employ cams either in the:

form of face or disk cams, which are suit-' ably constructed for the purpose. The cams are inmost cases conventional illustrated, hutit will be understood t at in practice they are correctly constructed and timed so as to cause the various mechanisms to operate in the manner hereinafter de scribed.

The machine includes an awl, and nechan ism for actuating the same tocause it to penetrate the work and to feed the Work with I a step-by-step movement; a'needle and ac? tuating mechanism therefor,- a looper and mechanism by which the looper is causedfto ating mechanism,-all as will be "described in detail.

Needle actuating mchanism The needle,

which is of the hooked, oscillatory type,;is

indicated at 10, (Figs. 3,4 audit). Said needle is mounted in a carrierij any suit porting end of the awl is beve so that a cross-sectionthereof is triangular.

able way and oscillated, through a link 12, by a lever 13, which is fulcrumed on a stud 14, projectin from the head A. The lever 13 is actuate by a cam 15, which is keyed to the driving-shaft 16 mounted in the head A. Awl actuating Jpechanism.--Referrin to Fig. 5, it will be seen that the awl 50 is o the oscillatory type. It receives in addition 'to its oscillatin motion, a side thrust which effects the fee ing of the work, and which, together with the oscillating motion, produces a form of four-Way feed. The awl is clamped to a carrier 51, as shown in Fig. 7. The suped on one edge The beveled edge occupies a beveled groove 511 formed in the carrier to receive it, and the awl is forced into said groove by a clamping plate 512 which is pressed upon its upper edge by a screw 513 threaded into the carrier. The formation of the awl and groove prevent the former from twistin in the latter and becoming out of line, an enable the clamping-plate 512 to so wedge them together that they are held by the greatest possible friction. Said carrier is oscillatably mounted on a sleeve 510, which in turn is mounted on astud 52 rojectin from the head A, and on which the need ecarrier 11 is also mounted. The carrier 51 isprovided with a segmental rim 53, which'slides in a guide 54 formed on a block' 55. An arm 56 pro'ects from the block 55 and sup orts at its en the sleeve 510, with which it as a screw-thread connection. A stud 57 projecting from the needle-carrier 11 occupies a hole 58 formed in the awl-carrier 51. 1 This same stud forms the connection between the needle-carrier and the link 12, so it is evident that the oscillation imparted to the two carriers mounted on the same axis is simultaneous and uniform. The needle and awl, however, are mounted on opposite sldes of the axis of rotation and point n opposite dlIGOtlODB. A

suitable space is allowed between the two' points so that as either one is entering the work, the other has left it. A flanged segmental guide 59 is affixed to the'head, for the purpose of guiding and bracing the needle-carrier.

Referring to Fig. 5, it will be seen that the block 55 is mounted and adapted to slide on a rod 60, parallel t'othe axis 0 carriers 12 and 51. One end of said rod is secured to the head A and the other end to a bracket 61 secured to the head. The bracket 61 is formed with a slot 62 in which is. set an adjustable stud 63. 'Said stud occupies a slot 64 formed in a lever 65 of which it constitutes the fulcrum, (see Figs. 2, 5 and 8). On one end of the lever 65 is a roller 66 which rolls in a cam 67 keyed to the shaft 16. The other end of the lever is connected by a bolt 68 to the sliding block 55. The throw of the cam 67 transmits to'the block 55 a reciprorotation of the eating motion on the rod 60. The block 55 carries the awl-carriorhl which has a sliding axial connection with the needle-carrier 11, and it has already been shown that the awlcarrier is free to oscillate in said block. The

cams 15 and 67 are so timed that the awl 50 r is oscillated to enter the work. It is advanced axially to alinement with the needle 10, oscillated in the o posite direction so as to leave the work an finally retracted axially from the needle to its original position, thus completing a four-way motion. The feeding motion of .the awl may be varied by shifting the fulcrum 63 in the slot 62, thus giving more or less throw to the lever 65.

Looper mechanism.While no specific" looper-actuating' mechanism is an essential feature of the present invention, I have shown herein a novel form of mechanism which I consider to be an improvement over the-prior art and to contribute to the most perfect embodiment of my invention in a shoese machine. (See Figs. 9, 10, 11 and 12). he looper 70 is shown as secured to one end of a bell-crank arm 71, which is pivoted at one end of a lever 72 by a stud 73. The lever 72 is pivoted b a stud 74 to an ear projecting from the hea A, and is provided with a cam-roller 75 at its rear end. For the sake of rigidity the lever 72 provided with an elongated bearing 77 in w 'ch the stud 74 is located, (see 12). The elongation is shown as turned down and u on it is mounted a secondar lever 78, whic together with the lever 72 is retained b the head of the stud 74. On the rear en 1 of the lever is a cam-roller 79 which lies approximately below the cam-roller 75. The rollers 75 and 79 occu y cam-paths 76 and 80 formed in the perip cry of a cam-disk 81, which is keyed to the shaft 16. The paths 76 and 80 form in reality but one groove, but the divided into the two concentric jpat whose side walls deviate slightly 1 erally. The path 76 is inside the ath 80 ut as the deviation of the two is ess than the difference in width, they do not conflict. The forward end of the lever 78 is provided with a seg mentof gear-teeth 82, which mesh with a segment of gear-teeth 83 formed on the rear of the arm 71. Lateralmotion is imparted to the,looper 70 by 'the cam 76, but said looper, being substantially at a right angle to the radius of the segment 83, receives from the cam 80 a back-and-forth motion, which, combined with the lateral motion, causes the looper to encircle the needle. After encircling the needle, the looper is caused to dart to a position t ant to the arc of the needle, so that the thread which the needle is drawing throu h the between substance has a direct pu from the looper, as shown in Fig 9 by the dotted lines.

Thread ji for actuating the thread-finger 46 may be oove is forcing them apart.

normally held in a horizontal position by a of any convenient form, the one shown being ve similar to those heretofore employed. The thread-finger rojects from an ear forminga 1part of the ead, and it is caused to rock t The lever 48 is actuated by a cam 49 keyed to the shaft 16, and is provided with the slot 480 by which connection is made with the link 47. If it is found that the thread-finger takes too much thread, s throw may be lessened by setting the connection in the slot 480 closer to the fulcrum of the lever 48. The description of the operation of the thread finger is hereinafter given in connection with the stitch formation". It may be priefly stated, however, that the thread-finger has a single forward and two backward movements.

Having now described the needle, awl, and I the looper-actuating mechanisms, I will now describe the devices which supply and dcliver the thread to the looper and which include a wax-pot and various other mechanisms interposed between the source of supply and the looper.

Wax p0t.-The wax pot is inclosed in a casing D to which steam for heating the wax is supplied through the pipe d and exhausts through a pipe d", the said casing being provided with a nipple (i having a stripping plug (1' which is, as is usual, of soft material.

Thread tension dem ce.The tension device referred to is located directly above the wax-pot and as shown in Fig. 15, com rises two fingers 89 and 99 between whic the thread passes, and which are pivoted together by a pin 91. The finger 89 is swiv eled to an car 92 projecting from the head A by a pin 93. The rear end of the finger 90 carries an adjustable set-screw 94, set in alinement with the pin 93. A wedge-piece 95 carried at one end of a hell-crank lever 96 is adapted to close the gripping ends of the fingers 89 and 90 by entering between the adjacent ends of the pin 93 and screw 94, and The tension fingers are spring 97, (see Fig. 3.) The lever 96, which carries the wedge-piece 95 is mounted on the stud 14. On the forward end of said lever is a' cam-roll 98 which cooperates with camfaces 99 and. 100 formed on the periphery of the can1-disk 67, (see Figs. 16, 17 and 18). The tensionactuating mechanism above described allows the gripping fingers to yield, under tension of the spring 97, to any demand of the thread without altering the pres sure produced by the wedge-piece 95. The gripping and releasing of the thread by the fingers 89 and. 90 is hereinafter described in connection with the stitch-forming mechanism.

Take '11 mec7umism.*The thread x, before passing t rough the looper 79, is drawn over erein by a link 47 connecting it to a bell-crank lever 48 fulcrumed to the head A.

a yieldin take-up or slack-controlling roll 84, (see ig. 3). Said roll is attached to an arm 85 pivoted at 86 to a bracket projecting forward from the front of the head A. The arm which carries the roll 84' is normally pressed forward by a sprin 87.

The thread runs from t 6 thread supply downward through the pivoted and yieldingly mounted' thread-locking, thread-gripplug or intermittent tension device afforded by the thread fingers 89 and 99, and which device can yieid to the pull on the thread against the s ress of the spring 97; and from said tension; device the thread runs downward to the wax-pot D and thence upward around the sheave 88 and forward around the yieldingly mounted take-up or slackcontrolling roll 84, to the looper or. threadguide 70.

Gage mechanism-The customary gage for gaging and forming an abutment for the shoe is indicated at 17 and the back-gage, (or in case of a welt-sewing machine, the weltguide), is indicated at 18. The gage 17 is adapted to slide in guides 19 19 and is held forward by asprin 20, (see Figs. 1 and 13). The gage 18is simi arly mounted in guides 21 21 and held forward by a spring 22. Between the gages 17 and 18, andmounted u on astud 23 are two op ipsitely arranged be -cranklevers, which, w en rocked about said stud, are adapted .to frictionally lock or release said gages. The lower lever, which cooperates with the gage 17, is rovided with an arm 24, in the free end of w ich is a stud 25, overlying the upper edge of said gage. The lever which cooperates withthe gage 18 is similarly provided with an arm 26 in the free end of which is a stud 27 underlying the lower edge of that gage. Arms 28 and 29 extend back from the arms 24 and 26 respectively, and are connected by a spring 30, which normall holds them toward each other, thus causing the studs 25 and 27 to engage the gages 17 and 18 respectively. The studs 25 and 27 being slightly in advance of the center of the stud 23, allow of a forward movement of the gages 17 and '18, but the spring 30 causes them to so bind the said gages that any backward movement causes them to bind with increased force and positir ely lock the gages. They are preferably flattened where they bear against the gages, so that they may gri said gages more effectively.

The inner aces of the arms 28 and 29 are beveled and (onstitutc cannfacos 31 and 32. A projection on. one arm of a lcycr 34, fulcrumed upon a stud 35, is adapted to enter between the faces 31 and 32 and force them apart, thus disengaging the studs 25 and 27 from the gages 17 and 18. Said lever 34 is actuated by a cam 36 keyed to the shaft 16. Fulcrumed upon the stud 3.3 is an additional lever 38, (see F ig. 1 )in the lower end of which is provided a slot 39. Said slot is adapted and block 43, which is made to bind on the gage by the opposing tendencies of said link and the spring 45, thus retracting the gage. The return of the block 43 is immediate and positive with that of the lever 38, but the gage 18, as previously stated, is returned by the spring 22 when the fpressure ceases. A set-screw 44, pro'ecting rom the rear end of the gage 18 is a apted to limit the forward movement of said gage, by impinging against the block 43. r

Provision is made. for imparting to the block and consequently to the age 18, more or less throw, as re uired. The slot 39, in the arm 38, is forme on an arc of which the stud 42 is the center. Hence, b setting the stud 40 nearer to the rock-she. t.35, the effective radius of the arm 38 will be correspondingly. lessened, and vice versa.

The cams 36 and 37 are so timed that they cause the releasing of the gages 17 and 18 and the retraction of said a e 18 only while the awl mechanism hereinie ore described is engaged in advancing the work for the next stitch.

Stitchformatvbm-The stitch-formation is best illustrated by Figs. 19 to 22. Fig. 19 shows the mechanism as it appears after the completion of one stitch, and as it is about to begin the next. A shoe to ,be sewn is presented to the machine when the parts are in such position that the thread-finger 46 and the needle 10 are retracted from each other,

and the thread a: is not clam ed between the fingers 89 and 90. In this ure, the needle 10 1s shown as about to enter the hole next in advance of the loose previous stitch looped about its shank. At this time the threadfinger 46 lies under the thread between the Iooper and the source of sup ly, but is not in contact with it. As the she. t 16 rotates, the needle is caused to pierce the between substance, as shown In 'Fig. 20, at which time When the cam 36 causes the rethread just before it reaches the limit of its backward movement. A further rotation of the shaft 16 causes the parts to assume the position shown in Fig.21.

The looper is shown as completing a loop of thread about the barb of the needle, during which the thread is free to pass between the fingers 89 and 90 which are now open. The thread-finger 46, however, has returned part way from the position shown in Fig. 20, thereby contributing toward the new loop gnly a portion of the thread drawn of? from the previous loop and corres ondingly lessening the demand on the fres 1 thread.

Fig. 22 shows the position of the parts as the cycle of movement is completed.- As shown in this uregthe needle has drawn the last-formed oop through the betweensubstance. The en ply-thread is now once more clamped by tlie fingers 89 and. 90, thereby subjectin the fresh thread to the increased tenslon. he thread-finger has made its second receding or return movement and has returned to its original position, thereby giving u to the needle the remainder of the rawn from the previous loop, and the looper has darted to a position tangential to the arc of the needle, so that the thread, in being drawn through the between-substance has a direct pull on the looper which is tangential thereto and consequently does not fear the work or pull through the barb of the needle, and chal'e. "In this position, the needle exerts considerable tension on the loop hooked over the barb, consequentiy the tension istransmitted to the previous loop which is thereby pulled tight to set the stitch. If, however, the free sup )ly of thread is not enough, the spring 97 a lows the clamping fin cm which clamp the supply of thread to yield under tension to any additional demand of the needle, rather than break the thread or tear the work. The needle, immediately after setting each stitch, advances a fraction of an inch and rests there while the work is being'ftd forward another step.

This movement of the needle relaxes the tension of the loop connected thereto, so that the feeding. movement is perfect! free and smooth, and-the work is not .dis ocated for the next stitch.

Having thus explained the nature of the invention and described a we. of constructing and using the same, alt on h without attempting to set 'forth'all of t e we s in which it may be made, or all of the mo es of its use, I declare that what I claim is:-

1. In a chain-stitch wax-thread sewing machine, the combination with a stitchforming mechanism com rising s. hooked needle and a looper or thread-guide, of a thread-finger arranged to on age the thread between said looper'or three guide and said needle, means for operating; said thread finget to cause the same to draw off a loop of l to deliver the remainder of said slack thread during the time when the needle is drawin a loop of thread through the material n through the previously formed loop of' he chain-stitch seam.

2. In a chain-stitch Wax-thread sewing machine, the combination with a stitchforming mechanism com rising a hooked needle and a looper or t read guide, of a slack-forming thread finger, and means for imparting to said thread finger a single slack drawing-off movement and two distinct delivery movements during the formation of each stitch, one of said delivery movements bein timed to furnish slack thread to the saidIooper or thread-guide, and the other of said movements being timed to furnish slack thread to the said needle.

3. In a chain-stitch sewing machine, the combination with a curved hooked needle and means for oscillating the same in the arc of a circle; of alooper or thread-guide, a pivoted arm on which said looper or. threadguide is mounted, and which is provided with a rack, a lever to which said arm is pivoted, a second lever having a rack engaging the said firstna1ned rack, and means for positively operating both of said levers to cause the looper or thread-guide to carry the thread around said needle and lay it in the hook thereof,

4. In a chain-stitch sewing machine, the combination. with a curved hooked needle and means for oscillatin the same in the arc of a circle, of mechanism for looping the thread around and laying it in the hook of said needle, said mechanism comprising a carrying lever, an actuating lever mounted upon the same pivot with said carrying lever, and extending in the same directions from said pivot, a looper arm pivoted at the end of said carrying lever, a looper mounted on said arm, connections between said 100 er-arm and said actuating lever whereby t e said looper arm may be oscillated relatively to its carrying-lever by oscillation of the said actuating lever, and means for oscillating said carrying-lever and actuating lever independently.

5. In a chain-stitch shoe sewing machine, the combination with a stitch-formin mechanism com rising a curved oscillatory hooked needlie, of an oscillating carrying lever, a looper arm pivoted to one end of said oscillating lever, a gear segment on the rear end of said looper arm, a secondary or actuating oscillating lever having a gear segment intermeshing with the first-mentioned segment, and means for oscillating the said levers to cause the loo er to encircle the needle and lay its thread in the hook thereof and then move to a position tangential to the arc in which said needle oscillates.

In testimony whereof I have affixed my signature, in presence of two witnesses.

JOHN J. HEYS.

Witnesses:

WALTER P. ABELL, C. F. BROWN. 

